Extraction device for extracting dusters, extraction arrangement for extracting dusters, and method for extracting dusters using the extraction arrangement

Abstract

Extraction device (1) for extracting dusters (2) - with a suction chamber (3) extending in an axial direction (X) from a first end (3a) to a second end (3b), and - with a suction channel (7), - wherein the suction chamber (3) has a first axial suction chamber opening (4) at the first end (3a) and a second axial suction chamber opening (5) at the second end (3b), - wherein the extraction chamber (3) has at least one further extraction chamber opening (6), wherein the further extraction chamber opening (6) opens into the extraction channel (7) and - wherein all extraction chamber openings (4, 5, 6) are fluidically connected to each other, - wherein at least one of the two axial suction chamber openings (4,5) has at least one scraper element (8,9), - wherein the at least one wiping element (8,9) is formed in a comb shape, such that the dust-collecting elements (18) of a duster (2) are fanned out when the duster (2) passes the comb-shaped wiping element (8,9).

Description

[0001] The present invention relates to a suction device for vacuuming feather dusters, comprising a suction chamber extending in an axial direction from a first end to a second end, and comprising a suction channel, wherein the suction chamber has a first axial suction chamber opening at the first end and a second axial suction chamber opening at the second end, wherein the suction chamber has at least one further suction chamber opening, wherein the further suction chamber opening opens into the suction channel, and wherein all suction chamber openings are fluidically connected to one another.

[0002] The invention further relates to a suction arrangement for vacuuming feather dusters, comprising such a suction device and a feather duster. Furthermore, the invention relates to a method for vacuuming feather dusters using such a suction arrangement.

[0003] Feather dusters are well known. They have dust-collecting elements as material for collecting dust particles, in particular a multitude of feather duster fibers, threads, fiber tufts or the like, which extend radially outward from a carrier running in an axial direction. The axial extension of the carrier usually serves as a handle with which an operator can guide the feather duster for the purpose of cleaning surfaces. The feather duster fibers are usually designed to become electrostatically charged during use so that the dust to be removed adheres to them and is not stirred up. The problem with this is that the dust adhering to the feather duster after the cleaning process is difficult to clean due to the electrostatic charge and also due to the high density of the feather duster fibers.The user must frequently go to a place where he can shake the duster to loosen the stuck dust.

[0004] In order to facilitate the cleaning of feather dusters, various suction devices for vacuuming feather dusters are known from the prior art, which are based on the principle that the feather duster with the part carrying the duster fibers is inserted into a chamber subjected to a suction flow, whereby the particles adhering to the duster fibers (dust and / or dirt particles) are entrained by the air flow due to the suction flow.

[0005] US 2 921 325 A discloses a household appliance for removing dust and lint from mops and brushes, and collecting the removed dust and lint in a container for subsequent disposal. Furthermore, FR 2 839 875 A1 discloses a device consisting of a removable sleeve inserted into a casing and fixed vertically to a base, with a dust bag interposed therebetween, which is subjected to pressure generated in a space between the base and the lower end of the sleeve, which is left free at the bottom of the sleeve. The negative pressure can be generated by a drive motor located in the space or by a household vacuum cleaner connected to the base of the sleeve by an end piece.US 2 437 340 A relates to devices for cleaning garbage bags and other fabric articles by suction means suitable for removing loose dirt and the like from the articles, wherein a container is provided in which the article can be placed in order to subject the article, when in the container, to the action of a suction device so as to remove dust, dirt and other loose particles from the article.

[0006] To optimize the cleaning effect, it is known, for example from US Pat. No. 6,530,114 B2, to divide the air flow introduced into the suction device into partial air flows, wherein a first partial air flow is deflected in a radial direction in a suction chamber and a second partial air flow is guided further in an axial direction. In addition, according to one embodiment of this prior art, a single, internally toothed, annular scraper element is arranged in the suction chamber. This scraper element serves to mechanically scrape off the particles adhering to the duster fibers. The scraper element is arranged in the suction chamber such that the radial partial air flow is discharged in a radial direction both above and below the scraper element.According to a further embodiment, several wires extending axially and spaced from one another in the circumferential direction are provided as stripping elements, the upper and lower ends of which are connected to the inner wall of the suction chamber, with the wires projecting slightly radially inward. However, the prior art from US Pat. No. 6,530,114 B2 has the disadvantage that a relatively high suction force is required to detach the particles from the duster fibers. Another disadvantage is that, due to the high density of duster fibers, particles often remain inside the duster because they are not optimally reached by the partial air flows.

[0007] Based on this, it is an object of the present invention to further develop a suction device of the type mentioned at the outset in such a way that the cleaning effect is improved.

[0008] The previously derived and stated object is achieved according to a first teaching of the present invention in a suction device for vacuuming feather dusters - with a suction chamber extending in an axial direction from a first end to a second end, and - with a suction channel, - wherein the suction chamber has a first axial suction chamber opening at the first end and a second axial suction chamber opening at the second end, - wherein the suction chamber has at least one further suction chamber opening, wherein the further suction chamber opening opens into the suction channel, and - whereby all suction chamber openings are fluidically connected to each other, - wherein at least one of the two axial suction chamber openings has at least one stripping element, - wherein the at least one stripping element is comb-shaped, such that the dust-receiving elements of a feather duster are fanned out as the feather duster is guided past the comb-shaped stripping element.

[0009] By providing at least one comb-shaped scraping element according to the application, in contrast to the prior art, the dust-receiving elements are fanned out, thus achieving more efficient and, in particular, improved cleaning of the feather duster. In particular, an improved cleaning effect is provided.

[0010] A comb-shaped stripping element is understood to mean, in particular, an element that has a plurality of comb teeth, in particular rod-shaped comb teeth. The (loose) ends of the comb teeth protrude substantially radially inward. Preferably, the two axial suction chamber openings can each have at least one comb-shaped stripping element.

[0011] Furthermore, it is essential in the proposed solution that a separate suction chamber is formed in the suction device, which can have a comb-shaped scraper element, in particular at its first (upper) end as well as at its second (lower) end, which enables the dust collection elements to be fanned out. The radial inner side of the scraper element forms the inner edge or at least part of the inner edge of the respective axial suction chamber opening. "Axial" in this context means that the opening points in the axial direction. In particular, the radial cross-section (cross-section in the radial direction or orthogonal to the axial direction) of the axial suction chamber openings is smaller than the radial cross-section of the suction chamber, whereby the scraper elements protrude radially inwards relative to the inner side of the suction chamber, thus forming a cross-sectional constriction.In particular, at least the (loose) ends of the plurality of comb teeth of a stripping element can protrude radially inward. Inside the suction chamber, in the area between the cross-sectional constrictions, the plurality of dust-receiving elements, which were previously radially compressed when the duster was inserted through the upper cross-sectional constriction because the duster has a larger cross-section than the upper and lower suction chamber openings, can then relax again, causing the dust to fan out. This fanning effect is significantly enhanced by the comb-shaped design.

[0012] When a feather duster is inserted into the extraction device, the comb-shaped scraping elements come into contact with the dust-receiving elements, in particular the duster fibers, threads, fiber tufts, or other materials, thereby opening the surface of the duster. Contact with the at least one comb-shaped scraping element allows adhering particles (dust particles and / or dirt particles) to be scraped off, i.e., mechanically removed.

[0013] Advantageously, the contact of the dust collection elements with the upper and / or lower comb-shaped scraper element also seals the extraction chamber. This seal allows a relatively strong, essentially radially directed air flow to be generated by means of the at least one further extraction chamber opening provided between the scraper elements. This strong flow particularly effectively removes particles adhering to the dust collection elements. Furthermore, the dust collection elements can be fanned out particularly sharply by the air flow as they pass by the preferably two scraper elements, so that in the axial area of ​​the extraction, i.e. in the extraction chamber between the cross-sectional constrictions, particles that are further inside the feather duster and would normally be hidden are also reached by the air flow. This further improves the cleaning effect.

[0014] The cleaning effect can be further improved by having the duster with an air-permeable base. The base refers to the part of the duster to which the dust-collecting elements, in particular the duster fibers, threads, fiber tufts, or the like, are attached. This base is typically made of solid material, such as plastic. By making the base permeable to air, which can be achieved, for example, by perforating the base, air can also flow through the base in a radial direction, which allows particles that have accumulated further inside the duster to be removed even more effectively.

[0015] According to one embodiment of the proposed suction device, it is provided that the stripping element delimits the first axial suction chamber opening and / or the further stripping element delimits the second axial suction chamber opening, wherein the respective axial suction chamber opening is radially delimited on at least one side, in particular on all sides, by the respective stripping element. In the simplest case, the respective stripping element is therefore arranged only on one side of the respective suction chamber opening, whereas the remaining part of the respective suction chamber opening is formed by the housing of the suction chamber and / or suction device. Preferably, however, the stripping element is designed to be completely radially circumferential, i.e., annular, and thus delimits all sides of the respective suction chamber opening.

[0016] According to another embodiment of the proposed suction device, the stripping element delimiting the first axial suction chamber opening and / or the stripping element delimiting the second axial suction chamber opening protrudes radially inward at least in some regions from an inner wall of the suction chamber, i.e., in the direction of the longitudinal axis of the suction chamber or into its interior. In particular, at least the (loose) ends of the comb teeth can protrude at least substantially inward. Preferably, the at least one comb-shaped stripping element can comprise a plurality of comb teeth. At least the radially inwardly directed ends of at least two comb teeth from the plurality of comb teeth can be spaced apart from one another in the axial direction. The comb teeth can be arranged parallel to one another or, starting from a common end (root), in a fan shape.In this case, two or more ends that protrude inward can be spaced apart from each other along the longitudinal axis. Furthermore, a plurality of ends that protrude inward are also spaced apart from each other in the radial direction.

[0017] A stripping element, in particular the comb teeth of the comb-shaped stripping element, can be made of any material. For example, the comb teeth can be rigid. For a particularly good cleaning effect, one embodiment proposes that a plurality of comb teeth of at least one stripping element be flexible.

[0018] A comb-shaped scraping element is also understood to mean, in particular, a ring of bristles or an element with notches on the inside.

[0019] As already explained above, a particularly strong radial air flow is generated in the suction chamber of the proposed suction device by arranging at least one further suction chamber opening between the stripping elements. This is preferably annular in the inner wall of the suction chamber, i.e., running in the circumferential direction of the inner wall. In order to maximize the radial air flow, no further suction chamber openings are provided upstream of the stripping element that particularly delimits the second axial suction chamber opening, i.e., upstream of the lower comb-shaped stripping element, apart from the at least one further suction chamber opening in the region between the stripping elements. Therefore, according to a further embodiment of the proposed suction device, the suction channel is fluidically connected to the suction chamber exclusively via the at least one further suction chamber opening.If necessary, in addition to the at least one further suction chamber opening, only the second axial suction chamber opening opens into the suction channel, in particular via an additional chamber, so that according to another embodiment the suction channel is fluidically connected to the suction chamber exclusively via the at least one further suction chamber opening and the second axial suction chamber opening.

[0020] According to another embodiment of the proposed suction device, the suction chamber is fluidically connected to the surroundings of the suction device via the first axial suction chamber opening, i.e., the first axial suction chamber opening is the outer opening (the opening furthest upstream) of the suction chamber. The suction chamber can also be connected to the surroundings of the suction device via the second axial suction chamber opening, which is located downstream of the first axial suction chamber opening. In this case, the air flow, and thus the extracted particles, are extracted from the suction chamber essentially via the additional suction chamber opening between the two stripping elements.In principle, however, it is also conceivable for the suction chamber to be fluidically connected not to the environment via the second axial suction chamber opening, but rather to an additional chamber adjacent to the suction chamber, which is fluidically connected to the suction channel, in particular via an additional chamber opening. The additional chamber then forms, together with the suction chamber, a cleaning chamber, with a radial suction flow being generated in the upper part of the cleaning chamber, which is formed by the suction chamber, and an axial suction flow being generated in the lower part of the cleaning chamber, which is formed by the additional chamber.

[0021] In particular, the suction chamber is partially or completely radially surrounded by a section of the suction channel. According to a further embodiment of the proposed suction device, it is therefore provided that a section of the suction channel that borders the at least one further suction chamber opening extends through a double wall that radially encloses, in particular delimits, the suction chamber and in particular also the additional chamber. The double wall, which is in particular a cylindrical double wall, is preferably constructed such that the inner wall of the double wall is provided with the further suction chamber opening and the outer wall of the double wall in particular has no openings. The suction chamber opening or openings is / are then designed in particular as a radial opening.The air radially extracted from the extraction chamber is thus guided via one or more radial extraction chamber openings into an annular extraction channel section arranged radially outside the radial extraction chamber opening(s) and from there is guided further in particular through the said double wall in the axial direction, preferably to a filter chamber.

[0022] If the air flow is to be filtered, a section of the extraction duct can extend through a filter chamber, in which a filter can be arranged to capture particles entrained by the air flow. After passing through the filter chamber, the purified air can be discharged back into the environment.

[0023] Furthermore, according to a further embodiment of the proposed suction device, a section of the suction channel extends through a handle of the suction device. One end of the handle is in fluid communication with the suction chamber via the at least one further suction chamber opening and / or the annular channel section. The other end of the handle can then serve to divert the air flow, in particular into a filter chamber.

[0024] A handle is provided in particular when the suction device is designed as a mobile and, in particular, portable suction device. Such a suction device can have accumulators for power supply, but additionally or alternatively also a mains connection. In principle, however, it is also conceivable to equip the suction device without its own power supply, in which case the suction device is designed, in particular, as an attachment to a vacuum cleaner, in particular a household vacuum cleaner. In other words, the suction chamber has a connection to an external device that generates the airflow required for suction.

[0025] Accordingly, according to a further embodiment, the proposed suction device can have an air flow generating device and / or be connectable to an (external) air flow generating device. The respective air flow generating device is then configured to generate an air flow, in particular a suction air flow, in the suction chamber. In particular, an air flow or partial air flow, preferably a suction air flow, directed from the first axial suction chamber opening to the at least one further suction chamber opening can be generated. Additionally or alternatively, an air flow or partial air flow, preferably a suction air flow, can be generated that is directed from the first axial suction chamber opening to the second axial suction chamber opening or from the second axial suction chamber opening to the further suction chamber opening.

[0026] The object is further achieved according to a further teaching of the present invention by a suction arrangement for vacuuming feather dusters with a suction device as defined above and with a feather duster which has an axially extending carrier on which dust collecting elements are arranged, in particular in the form of a plurality of feather duster fibers, threads, fiber tufts or the like extending radially outwards from the carrier, wherein the feather duster extends in the axial direction through the first and second axial suction chamber opening and touches both comb-shaped stripping elements.

[0027] By extending the duster through the two axial extraction chamber openings, with a section of the duster axially traversing the entire extraction chamber, radial extraction of the part of the duster located in the extraction chamber is achieved. Furthermore, the dust collection elements can be mechanically cleaned and simultaneously fanned out by the comb-shaped stripping elements, allowing the air flow to detach even particles further inside the duster. Accordingly, according to one embodiment of the proposed extraction arrangement, a portion of the dust collection elements in the extraction chamber is fanned out by the comb-shaped stripping elements.

[0028] To further enhance the cleaning result, according to another embodiment of the proposed extraction arrangement, the carrier is permeable to air at least in the radial direction. This permeability is achieved, in particular, by perforating the carrier. In particular, the carrier is permeable to air or perforated over the entire section provided with the dust-collecting elements. This allows the air introduced into the extraction chamber through the first axial extraction chamber opening to flow completely through the feather duster and also detach particles adhering to or near the carrier.

[0029] Furthermore, a previously defined feather duster is disclosed herein. In a feather duster having an axially extending support on which dust-receiving elements are arranged, in particular in the form of a plurality of feather duster fibers, threads, fiber tufts, or the like extending radially outward from the support, the support is permeable to air, in particular perforated, at least in the radial direction.

[0030] Such a feather duster can particularly preferably be used in combination with a suction device and / or suction arrangement as defined above.

[0031] Finally, according to yet another teaching, the object is achieved in a method for vacuuming feather dusters using a suction arrangement as defined above in that the feather duster is guided in the axial direction through the first and second axial suction chamber openings such that a section of the feather duster is located in the suction chamber.

[0032] In a first variant, an air flow is first introduced into the extraction chamber through the first axial extraction chamber opening and then, divided into partial air flows, is discharged from the extraction chamber through both the second axial extraction chamber opening and the at least one further extraction chamber opening. This flow pattern occurs particularly when, as described, an additional chamber is provided through which a portion of the air from the extraction chamber is diverted to flow axially onto the feather duster.

[0033] In a second, different variant, a partial air flow is first introduced into the extraction chamber through the first axial extraction chamber opening and a partial air flow through the second axial extraction chamber opening. Then, in the form of a combined air flow, it is discharged from the extraction chamber through at least one additional extraction chamber opening. This flow pattern occurs particularly when no additional chamber is provided and the air can flow into the extraction chamber through both axial extraction chamber openings.

[0034] In particular, the respective air flow and / or partial air flow is a suction air flow, i.e. there is a negative pressure in the suction chamber.

[0035] There are now numerous possibilities for designing and developing the proposed extraction device, the proposed extraction arrangement, the proposed duster, and the proposed method. In this regard, reference is made, on the one hand, to the claims subordinate to the main claim and the subordinate claims, and, on the other hand, to the description of exemplary embodiments in conjunction with the drawing. The drawing shows: Fig. 1 a schematic representation of a first embodiment of a proposed suction device, Fig. 2a a schematic representation of a feather duster inserted into the suction device in a detailed view, Fig. 2b is a schematic representation of a detailed view of another embodiment of a proposed suction device, Fig. 3 a schematic representation of a second embodiment of a proposed suction device, Fig. 4 a schematic representation of a third embodiment of a proposed suction device and Fig. 5 a schematic representation of a fourth embodiment of a proposed suction device.

[0036] The Fig. 1 to 5 show various embodiments of a suction device 1 for vacuuming feather dusters 2, wherein the suction device 1 each has a suction chamber 3 and a suction channel 7.

[0037] A feather duster 2 is generally understood to be a cleaning device having an axially extending carrier 19, which simultaneously serves as a handle, on which dust-receiving elements 18 are arranged as material for collecting particles P (dust particles and / or dirt particles). In particular, the dust-receiving elements 18 are a plurality of feather duster fibers 18 extending radially outward from the carrier 19. In the following, reference is made only to feather duster fibers 18 by way of example, although the described functionalities and effects also apply to other materials for collecting particles P, in particular strip- or thread-like materials.

[0038] The suction device 1 shown schematically in the figures is designed here as a mobile, portable hand-held device, which according to the Fig. 3 and Fig. 4 may also have a separate handle 13. According to the Fig. 1, Fig. 3 and Fig. 4, the extraction device 1 also has its own air flow generation device 16, which here, for example, has a motor / fan unit 20, accumulators 21 for power supply, and a control unit 22. Instead of the accumulators 21 or in addition thereto, a mains connection (not shown) for power supply can also be provided. Fig. The suction device 1 shown in Figure 5 is designed as an attachment for a vacuum cleaner (not shown) and therefore does not have its own airflow generation device, but instead has a connection 23 for connection to the vacuum cleaner. In the latter case, the vacuum cleaner or the airflow generation device integrated therein serves to generate the airflow S or partial airflows S1 and S2.

[0039] The suction chamber 3 serves to accommodate and guide a feather duster 2 and is suitable for cleaning the feather duster 2 by applying an air flow S or partial air flows S1, S2. The suction chamber 3 extends in an axial direction X from a first end 3a to a second end 3b. A first axial suction chamber opening 4 is provided at the first end 3a and a second axial suction chamber opening 5 is provided at the second end 3b. In the area between the axial suction chamber openings 4 and 5 or between the first end 3a and the second end 3b of the suction chamber 3, at least one further, here radial and annular, suction chamber opening 6 is provided, which opens into the suction channel 7. This is either a single further suction chamber opening 6 that extends at least over part of the circumference and in particular over the entire circumference of the suction chamber 3.Alternatively, several additional suction chamber openings 6 can be arranged circumferentially around the suction chamber 3, in particular at regular angular intervals. The aforementioned axial suction chamber openings 4, 5 and the additional suction chamber opening(s) 6 are all fluidically connected to one another via the suction chamber 3.

[0040] In the present embodiments, the two axial suction chamber openings 4 and 5 are each radially delimited by a separate stripping element 8 or 9, respectively, in this case on all sides. A stripping element 8 or 9 is formed in a comb shape. As can be seen in particular from the Fig. 2a and Fig. As can be seen from Figure 2b, a comb-shaped stripping element 8 or 9 has a plurality of comb teeth 24 or 25. The (loose) ends 26 or 27 project inward. Preferably, a plurality of ends 26 or 27 are spaced apart from one another in the X-direction in order to improve the fanning effect. In addition, a plurality of comb teeth 24 or 25 can be arranged, in particular circumferentially around the respective annular suction chamber openings 4, 5. In this case, the comb teeth 24 or 25 can run parallel to one another ( Fig. 2a). Alternatively, at least two comb teeth can project inwards in a fan-shaped manner from a common end 28, 29 (root 28, 29) or at least adjacent ends ( Fig. 2b).

[0041] The radial cross-section of the axial suction chamber openings 4 and 5, which here is formed by the respective annular and comb-shaped stripping elements 8 and 9, respectively, is smaller than the radial cross-section of the suction chamber 3 arranged between them. The comb-shaped design further improves the fanning effect. In particular, the comb-shaped stripping elements 8 and 9 cause the dust collection elements 18 of the feather duster 2 to fan out and be mechanically cleaned as the feather duster 2 is guided past the comb-shaped stripping element 8, 9. This fanning facilitates the removal of particles P inside the feather duster 2.

[0042] In the proposed suction device 1, the suction channel 7 in the embodiments in the Fig. 1 and Fig. 3 is fluidically connected to the suction chamber 3 via both the at least one radial suction chamber opening 6 and the second axial suction chamber opening 5, but not to any further opening. In this case, an air flow S introduced into the suction chamber 3 through the first axial suction chamber opening 4 is divided into two partial air flows S1 and S2, with one partial air flow S1 being directed through the radial suction chamber opening 6 and the second partial air flow S2 being directed through the second axial suction chamber opening 5 and further through an additional chamber 10 and an additional chamber opening 11 into the suction channel 7.

[0043] In the examples shown in the Fig. 4 and Fig. 5, the suction channel 7 is fluidically connected to the suction chamber 3 exclusively via the at least one radial suction chamber opening 6. In this case, two partial air flows S1 and S2 combine in the suction chamber 3 to form a resulting air flow S, wherein the first partial air flow S1 is guided through the first axial suction chamber opening 4 and the second partial air flow S2 is guided through the second axial suction chamber opening 5 into the suction chamber 3. The resulting air flow S is guided through the radial suction chamber opening 6 from the suction chamber 3 into the suction channel 7.

[0044] In all embodiments, the suction chamber 3 is in fluid communication with the surroundings of the suction device 1 via the first axial suction chamber opening 4. The second axial suction chamber opening 5 is only in the embodiments of the Fig. 4 and Fig. 5 with the environment of the suction device 1 in fluidic connection, but ends in the embodiments of the Fig. 1 and Fig. 3 into said additional chamber 10, which has said additional chamber opening 11 at its opposite end.

[0045] The suction channel 7 can have various sections. A section 7.1 of the suction channel 7, which is directly adjacent to the at least one radial suction chamber opening 6, extends in all illustrated embodiments through a double wall 12, which has the radial suction chamber opening 6 on the inside, but has no further opening on the outside. The double wall 12 is provided, with respect to the axial direction X, at least at the height of the suction chamber 3, but can also extend further away from the suction chamber 3 in the axial direction X and encloses, for example, the additional chamber 10, which in Fig. 1. In the embodiments of the Fig. 3 to 5, the section 7.1 with the double wall 12 is limited to the axial area at the level of the suction chamber 3. From here, either a further section 7.2 of the suction channel 7 extends through a handle 13 of the suction device 1 ( Fig. 3 and Fig. 4) or the suction channel 7 ends directly in the connection 23 for the vacuum cleaner ( Fig. 5).

[0046] Finally, the suction channel 7 may have a section 7.3 which extends through a filter chamber 14, which is Fig. 1, Fig. 3 and Fig. 4. The filter chamber 14 is part of the extraction device 1. A filter 15 can be placed in the filter chamber 14 to collect particles P carried along with the air flows S, S1 and / or S2. After passing through the filter chamber 14, the air then exits back into the environment of the extraction device 1.

[0047] As with the comparison of Fig. 1 and Fig. 3 on the one hand with the Fig. 4 and Fig. 5, on the other hand, an additional chamber 10 adjoining the suction chamber 3 in the axial direction X is not absolutely necessary. Such an additional chamber 10 can be provided to clean an inserted feather duster 2 by an additional axial partial air flow S2, which is then discharged through the additional chamber opening 11 ( Fig. 1 and Fig. 3). If, however, such an additional chamber 10 is omitted, only the section 2.1 of the feather duster 2 located within the extraction chamber 3 is subjected to air flow, whereby, as previously explained, a first partial air flow S1 is introduced into the extraction chamber 3 through the first axial extraction chamber opening 4 and a second partial air flow S2 is introduced through the second axial extraction chamber opening 5. A resulting air flow S is then discharged from there in the radial direction Y through the at least one radial extraction chamber opening 6.

[0048] For extraction, a feather duster 2 is now inserted into the extraction chamber 3 from above, i.e., through the first axial extraction chamber opening 4, and from there guided further through the lower, second axial extraction chamber opening 5. Since the feather duster 2 has a greater axial extent than the extraction chamber 3, it is then moved further in the axial direction X until the entire part of the feather duster 2 comprising the feather duster fibers 18, or at least the majority thereof, has been exposed to the cleaning effect in the extraction chamber 3.

[0049] The entirety of the suction device 1 and the duster 2 is defined here as the suction arrangement 17. In this suction arrangement 17, the duster 2 touches both stripping elements 8 and 9, causing the aforementioned fanning out of the duster fibers 18. The fanning out, which is Fig. 1 and 3 to 5 is only indicated, is shown in the detailed view in Fig. 2 can be seen even more clearly. Due to the fanning out, even otherwise difficult-to-access areas between the duster fibers 18 can be captured by the respective air flow S or S1.

[0050] Fig. 2a and Fig. 2b additionally show a special feature of the feather duster 2. In the embodiment shown here, the latter is provided with an axially extending carrier 19, which is designed to be permeable to air at least in the radial direction Y. More precisely, the carrier 19 is perforated here, so that a portion of the flowing air can also be guided radially through the carrier 19, which enables the detachment of the particles P in areas close to the carrier. List of reference symbols: 1 suction device 2 feather dusters 2.1 Section of the feather duster 3 Suction chamber 3a first end of the suction chamber 3b second end of the suction chamber 4 first axial suction chamber opening 5 second axial suction chamber opening 6 radial suction chamber opening(s) 7 Suction channel 7.1 Section of the suction duct 7.2 Section of the suction duct 7.3 Section of the suction duct 8 scraper element 9 Scraper element 10 additional chamber 11 Additional chamber opening 12 double wall 13 Handle 14 Filter chamber 15 filters 16 Air flow generation device 17 Extraction arrangement 18 dust collection elements 19 Wearers of the Feather Duster 20 Motor / fan unit 21 accumulators 22 Control unit 23 Vacuum cleaner connection 24 comb teeth 25 comb teeth 26 (loose) ends of the comb teeth 27 (loose) ends of the comb teeth 28 (fixed) end of the comb teeth 29 (fixed) end of the comb teeth X axial direction Y radial direction S Air flow S1 Partial air flow S2 Partial air flow P particles, especially dust particles and / or dirt particles

Claims

[1] Suction device (1) for vacuuming feather dusters (2) - with a suction chamber (3) extending in an axial direction (X) from a first end (3a) to a second end (3b), and - with a suction channel (7), - wherein the suction chamber (3) has a first axial suction chamber opening (4) at the first end (3a) and a second axial suction chamber opening (5) at the second end (3b), - wherein the suction chamber (3) has at least one further suction chamber opening (6), wherein the further suction chamber opening (6) opens into the suction channel (7) and - wherein all suction chamber openings (4, 5, 6) are fluidically connected to one another, - wherein at least one of the two axial suction chamber openings (4, 5) has at least one stripping element (8, 9), - wherein the at least one stripping element (8, 9) is formed in a comb-shaped manner, such that the dust-receiving elements (18) of a feather duster (2) are fanned out when the feather duster (2) is guided past the comb-shaped stripping element (8, 9). [2] Suction device (1) according to claim 1, characterized by that the stripping element (8) delimits the first axial suction chamber opening (4) and / or the further stripping element (9) delimits the second axial suction chamber opening (5), wherein the respective axial suction chamber opening (4, 5) is radially delimited on at least one side, in particular on all sides, by the respective stripping element (8, 9). [3] Suction device (1) according to one of the preceding claims, characterized by , that - the at least one comb-shaped stripping element (8, 9) comprises a plurality of comb teeth (24, 25), - wherein at least the radially inwardly directed ends (26, 27) of at least two comb teeth (24, 25) from the plurality of comb teeth (24, 25) are spaced apart from one another in the axial direction (X). [4] Suction device (1) according to one of the preceding claims, characterized by that a plurality of comb teeth (24,25) of at least one stripping element are formed flexibly. [5] Suction device (1) according to one of the preceding claims, characterized by that the at least one further suction chamber opening (6) is formed in a ring shape in an inner wall of the suction chamber (3). [6] Suction device (1) according to one of the preceding claims, characterized by that the suction channel (7) - is fluidically connected to the suction chamber (3) exclusively via the at least one further suction chamber opening (6) or - is fluidically connected to the suction chamber (3) exclusively via the at least one further suction chamber opening (6) and the second axial suction chamber opening (5). [7] Suction device (1) according to one of the preceding claims, characterized by that the suction chamber (3) - is fluidically connected to the environment of the suction device (1) via the first axial suction chamber opening (4) and / or - is fluidically connected via the second axial suction chamber opening (5) to the surroundings of the suction device (1) or to an additional chamber (10) adjacent to the suction chamber (3), wherein the additional chamber (10) is fluidically connected to the suction channel (7) in particular via an additional chamber opening (11). [8] Suction device (1) according to claim 7, characterized bythat a section (7.1) of the suction channel (7), which adjoins the at least one further suction chamber opening (6), extends through a double wall (12) which radially encloses the suction chamber (3) and in particular also the additional chamber (10). [9] Suction device (1) according to one of the preceding claims, characterized by that a section (7.2) of the suction channel (7) extends through a handle (13) of the suction device (1). [10] Suction device (1) according to one of the preceding claims, characterized by that a section (7.3) of the suction channel (7) extends through a filter chamber (14) in which a filter (15) can be arranged to receive particles (P) carried along by an air flow (S). [11] Suction device (1) according to one of the preceding claims, characterized bythat it has an air flow generating device (16) and / or is connectable to an air flow generating device which is configured to generate an air flow (S), preferably a suction air flow, in the suction chamber (3). [12] Extraction arrangement (17) for extracting feather dusters (2) - with a suction device (1) according to one of the preceding claims and - with a feather duster (2) having an axially extending support (19) on which dust-receiving elements (18) are arranged, in particular in the form of a plurality of feather duster fibres, threads, fibre tufts or the like extending radially outwards from the support (19), - wherein the feather duster (2) extends in the axial direction (X) through the first and second axial suction chamber openings (4, 5) and touches both comb-shaped scraping elements (8, 9). [13] Suction arrangement (17) according to claim 12, characterized bythat a part of the dust collecting elements (18) is fanned out in the suction chamber (3) by the comb-shaped scraping elements (8,9). [14] Suction arrangement (17) according to claim 12 or 13, characterized by that the carrier (19) is permeable to air, in particular perforated, at least in the radial direction (Y). [15] Method for vacuuming feather dusters (2) using a suction arrangement (17) according to one of claims 13 to 14, characterized by that the feather duster (2) is guided in the axial direction (X) through the first and second axial suction chamber openings (4, 5) such that a section (2.1) of the feather duster (2) is located in the suction chamber (3), - wherein an air flow (S) is first introduced into the suction chamber (3) through the first axial suction chamber opening (4) and then, divided into partial air flows (S1, S2), is discharged from the suction chamber (3) through both the second axial suction chamber opening (5) and the at least one further suction chamber opening (6), or - wherein first a partial air flow (S1) is introduced into the suction chamber (3) through the first axial suction chamber opening (4) and a partial air flow (S2) is introduced through the second axial suction chamber opening (5) and then, in the form of a combined air flow (S), is discharged from the suction chamber (3) through the at least one further suction chamber opening (6).

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